144 0001821820 XXXXXXXX LIVE 0001122976 AVIENT CORP 001-16091 33587 WALKER ROAD AVON LAKE OH 44012 440-930-1000 Beggs Jamie A. Former Officer Common Fidelity Brokerage Services LLC

900 Salem Street Smithfield RI 02917

41442 1882519.49 91719550 08/07/2026 NYSE Common 08/24/2023 Open Market Purchase Issuer N 23777 08/24/2023 Cash Common 02/08/2024 Restricted Stock Vesting Issuer N 3917 02/08/2024 Compensation Common 02/14/2025 Restricted Stock Vesting Issuer N 3811 02/14/2025 Compensation Common 02/17/2026 Restricted Stock Vesting Issuer N 4742 02/17/2026 Compensation Common 02/19/2026 Restricted Stock Vesting Issuer N 1963 02/19/2026 Compensation Common 08/07/2026 SAR Issuer N 3232 08/07/2026 Compensation Y 08/07/2026 /s/ Louis Kurnick, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Jamie A. Beggs